The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1983
Filed:
Mar. 23, 1981
Applicant:
Inventors:
Seitoku Saito, Tokyo, JP;
Hideo Kobayashi, Tokyo, JP;
Assignee:
TDK Electronics Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428220 ; 428694 ; 428695 ; 428900 ; 428328 ; 75 / ; 252 6255 ; 427132 ; 360134 ;
Abstract
A magnetic recording medium obtained by coating a magnetic metallic powder with a binder on a non-magnetic substrate, wherein said magnetic metallic powder is mainly made of acicular particles obtained by a dry reduction process and said magnetic recording medium has a residual magnetic flux density of greater than 2,600 gauss, a coercive force of 1,300 to 1,800 Oe, a thickness of a magnetic layer of 1.5 to 3.5 .mu.m and a C/N ratio (carrier signal/noise level) in video band of greater than 4 dB of the C/N ratio of the standard video tape.